Merge pull request #1 from the-virtual-brain/trunk

Update from upstream
Merge pull request #2 from the-virtual-brain/trunk

Update fork
Merge pull request #3 from the-virtual-brain/trunk

Merge changes in equation PulseTrain
Merge pull request #4 from the-virtual-brain/trunk

Robert's update
Merge pull request #5 from the-virtual-brain/trunk

Merge changes from surfaces datatypes
Merge pull request #6 from the-virtual-brain/trunk

Update from main repo
Tutorial: new tutorial showing the different behaviours of the Reduced Wong Wang model
Tutorials: update readme
Merge pull request #30 from pausz/trunk

New tutorial